swapping model to qwen-2.5-72B

app.py

@@ -32,7 +32,7 @@ def respond(
     response = ""
     
     for message in  client.chat.completions.create(
-        model="CohereForAI/c4ai-command-r-plus-08-2024",
+        model="Qwen/Qwen2.5-72B-Instruct",
         max_tokens=max_tokens,
         stream=True,
         temperature=temperature,